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dc.contributor.authorThe ALICE Collaborationeng
dc.contributor.authorAamodt, K.eng
dc.contributor.authorAbel, N.eng
dc.contributor.authorAlme, Johaneng
dc.contributor.authorBablok, Sebastian Roberteng
dc.contributor.authorHaaland, Øystein Senneseteng
dc.contributor.authorHuang, M.eng
dc.contributor.authorKanaki, Kalliopieng
dc.contributor.authorLarsen, Dag Toppeeng
dc.contributor.authorNystrand, J.eng
dc.contributor.authorPommeresche, Bjørneng
dc.contributor.authorSkjerdal, Kyrreeng
dc.contributor.authorWagner, B.eng
dc.date.accessioned2011-03-14T08:30:24Z
dc.date.available2011-03-14T08:30:24Z
dc.date.issued2010-07-12eng
dc.PublishedThe European Physical Journal C 68: 89-108en_US
dc.identifier.urihttps://hdl.handle.net/1956/4580
dc.descriptionThis publication is dedicated to the memory of our colleague Hans-Åke Gustafsson.
dc.descriptionThere are 1058 authors. Only a few of them have been given author entries in addition to the Collaboration.en_US
dc.description.abstractCharged-particle production was studied in proton–proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η|<1.4. In the central region (|η|<0.5), at 0.9 TeV, we measure charged-particle pseudorapidity density dNch/dh = 3.02±0.01(stat.)+0.08-0.05(syst.)dNchd=302001(stat)+008−005(syst) for inelastic interactions, and dNch/dh = 3.58±0.01(stat.)+0.12-0.12(syst.)dNchd=358001(stat)+012−012(syst) for non-single-diffractive interactions. At 2.36 TeV, we find dNch/dh = 3.77±0.01(stat.)+0.25-0.12(syst.)dNchd=377001(stat)+025−012(syst) for inelastic, and dNch/dh = 4.43±0.01(stat.)+0.17-0.12(syst.)dNchd=443001(stat)+017−012(syst) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7%±0.5%(stat.)+5.7-2.8%(syst.)247%05%(stat)+57−28%(syst) for inelastic and 23.7%±0.5%(stat.)+4.6-1.1%(syst.)237%05%(stat)+46−11%(syst) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to proton–antiproton data and to model predictions.en_US
dc.language.isoengeng
dc.publisherSpringeren_US
dc.rightsAttribution-NonCommercial CC BY-NCeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc/2.5/eng
dc.titleCharged-particle multiplicity measurement in proton–proton collisions at √s = 0.9 and 2.36 TeV with ALICE at LHCen_US
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersionen_US
dc.rights.holderCERN for the benefit of the ALICE collaboration 2010en_US
dc.rights.holderCopyright CERN for the benefit of the ALICE collaboration 2010. This article is published with open access at Springerlink.comen_US
dc.identifier.doihttps://doi.org/10.1140/epjc/s10052-010-1339-x
dc.subject.nsiVDP::Mathematics and natural science: 400en_US


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